DVD drive won't read Vegas 2

Hey I have recently bought rainbow 6 Vegas 2, but my DVD drive wont read it. Though it has read before. But every time i insert the Vegas 2 disk it wont always read. The auto play wont come up, and the Vegas 2 icon wont show on the DVD drive. But most games will show automatically. Someone please help, i love this game and i want to play it again....

If all other media you put in your drive works except for R6V2 then it might be an issue with your disc. Is it by any chance scratched badly? Try to clean it to see if that helps, if you have some serious scratches just search around as there are a plethora of guides online.